Güncel Gönderiler: Fen Edebiyat Fakültesi
Toplam kayıt 1429, listelenen: 541-560
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A novel cry2Ab gene from the indigenous isolate Bacillus thuringiensis subsp. kurstaki
(Korean Society for Microbiolog and Biotechnology, 2012)A novel cry2Ab gene was cloned and sequenced from the indigenous isolate of Bacillus thuringiensis subsp. kurstaki. This gene was designated as cry2Ab25 and its sequence revealed an open reading frame of 1,902 bp encoding ... -
The tritium, deuterium and oxygen-18 isotope levels determination in various waters in Rize and Trabzon
(Taylor and Francis Inc., 2012)Rize and Trabzon are provinces at north-east site of Turkey, on the eastern Black Sea coast. There has been no information about isotopic ?18O, ?D and tritium determination reported in water samples in the Rize and Trabzon ... -
Radioactivity and heavy metal concentrations in food samples from Rize, Turkey
(Wiley, 2012)BACKGROUND: Rize in Turkey was contaminated by the Chernobyl accident in 1986. A comprehensive study was planned and carried out to determine the radioactivity levels and heavy metal concentrations in four food categories ... -
Current transport mechanism in CdS thin films prepared by vacuum evaporation method at substrate temperatures below room temperature
(Elsevier, 2012)CdS thin films were deposited by vacuum deposition method at low substrate temperatures instead of the commonly used vacuum deposition at high substrate temperatures (T S > 300 K). The effect of low substrate temperature ... -
Synthesis and biological activity studies of new hybrid molecules containing tryptamine moiety
(Springer, 2012)The synthesis of N?-(4-substitutedphenylsulfonyl)-2-{4-[2-(1H-indol- yl)ethyl]-3-(4-chlorobenzyl)-5-oxo-4,5-dihydro-1H-1,2,4-triazol-1-yl} acetohydrazides (3a-c), 2-{4-[2-(1H-indol-3-yl)ethyl]-3-(4-chlorobenzyl)-5-oxo- ... -
Scorzonera ahmet-duranii sp. nov. (Asteraceae) from southwest Anatolia, and its phylogenetic position
(2012)Scorzonera ahmet-duranii S. Makbul & Coskuncelebi sp. nov. (Asteraceae) is described and illustrated as a new species endemic to Turkey. It is morphologically similar to S. semicana DC., but differs by its rootstock, deeply ... -
Poly(vinylferrocenium) perchlorate-polyaniline composite film-coated electrode for amperometric determination of hydroquinone
(Springer, 2012)Poly(vinylferrocenium) perchlorate-polyaniline (PVF +-PANI) composite film was synthesized electrochemically on Pt electrode in a methylene chloride solution containing a mixture of poly(vinylferrocene) (PVF) polymer and ... -
Structural and optical properties of ZnO and Al-doped ZnO microrods obtained by spray pyrolysis method using different solvents
(Elsevier, 2012)ZnO and Al-doped ZnO microrods were obtained by spray pyrolysis method using different solvents such as methanol and propanol. The effect of the type of solvent in the starting solution on the structural, morphological and ... -
Comparative study of critical current density, pinning force and levitation force behavior in Yb211 doped-Sm123 bulk superconductors
(Elsevier, 2012)The effect of Yb211 doping on the critical transition temperature (T c), c-lattice parameter, critical current density (J c), volume pinning force (F p) and the vertical levitation force density properties of MPMG-processed ... -
Solvothermal synthesis and characterization of coordination polymers of cobalt(II) and zinc(II) with succinic acid
(Springer, 2012)The complexes [Co(C 4H 4O 4)] n (1) and [Zn(im)2- (C 4H 4O 4)] n (2) (C 4H 4O 4 = succinate dianion, suc; im = imidazole) have been synthesized solvothermally and characterized by elemental analysis, IR, TG-DTA, and ... -
Hydrophobin genes of the entomopathogenic fungus, Metarhizium brunneum, are diVerentially expressed and corresponding mutants are decreased in virulence
(Springer, 2012)Hydrophobins are small, cysteine-rich, secreted proteins, ubiquitously produced by Wlamentous fungi that are speculated to function in fungal growth, cell surface properties, and development, although this has been rigorously ... -
Determination of the bacterial flora as a microbial control agent of Toxoptera aurantii (Homoptera: Aphididae)
(Springer, 2012)Toxoptera aurantii (Homoptera: Aphididae) is one of the most important pests of many agricultural plants such as camellia, cocoa and coffee worldwide. The culturable bacterial flora of the pest was determined to find new ... -
Microscopic study of Ca + Ca fusion
(American Physical Society, 2012)We investigate the fusion barriers for reactions involving Ca isotopes 40Ca+40Ca, 40Ca+48Ca, and 48Ca+48Ca using the microscopic time-dependent Hartree-Fock (TDHF) theory coupled with a density constraint. In this formalism ... -
Design and synthesis of new 1,2,4-triazole deriaties containing morpholine moiety as antimicrobial agents
(TÜBİTAK, 2012)2-Morpholine-4ylethyl-3H -1,2,4-triazole-3-ones (2a, 2b) were obtained from the condensation between the corresponding ethoxycarbonylhydrazones and 2-morpholinoethanamine. 2a was conerted to acetohydrazide (4) ia the ... -
Antimicrobial activity and chemical composition of the essential oil from Campanula glomerata L. subsp. hispida (Witasek) Hayek
(RTEÜ, Fen - Edebiyat Fakültesi, Biyoloji Bölümü, 2012)The volatile components of the essential oil from Campanula glomerata L. subsp. hispida (Witasek) Hayek was analyzed by GC and GCMS. Forty-eight compounds representing 89.0 % of the total oil were characterized and the ... -
Composition and antimicrobial activity of essential oil from the flower of Rhododendron luteum Sweet
(Chemical Publishing Co., 2012)Essential oil from air-dried flower of Rhododendron luteum Sweet (Ericaceae), was obtained by hydrodistillation in a Clevenger-type apparatus and analyzed by GC-MS and GC-FID. Sixty-four components were identified in the ... -
Synthesis, structural and biochemical activity of pyridine substituted pyrrole ligands and their mononuclear Cu(II), Ni(II) and Co(II) complexes
(2012)Monomeric copper(II), nickel(II) and Co(II) complexes of 6-(2,5-dimethyl-1 H-pyrrol-1-yl)pyridin-2-amine (dmpypr) and 2,6-bis(2,5- dimethyl-1 H-pyrrol-1-yl)pyridine (tmpypr) were prepared and characterized by elemental ... -
Comparative essential oil analysis of Calendula arvensis L. extracted by hydrodistillation and microwave distillation and antimicrobial activities
(2012)The present study was to investigate the influence of the extraction methods on yield and chemical composition of the essential oil of Calendula arvensis L. The volatiles of C. arvensis have been isolated by hydrodistillation ... -
Volatile constituents and antimicrobial activity of the essential oils from Cladonia rangiformis Hoffm. and Cladonia furcata (Huds.) Schrad
(2012)This study was designed to examine the chemical compositions and antimicrobial activities of the essential oils from Cladonia rangiformis Hoffm. and Cladonia furcata (Huds.) Schrad. The essential oils were isolated by ...